All my fish are feeding well. playing and no change in colour but they are spending more time at the top of the tank. But no-one looks unwell. This all started when my baloon mollies had babies - 17 of them (congratulations to me) . Naturally i was thrilled. Babies are happy, swimming around freely and growing well.

I've got a 62 litre tank.
Have 3 balloon mollies. 2 sail fish mollies. 2 gouramis. and the babies. They all get on nicely. All seem happy at the moment, but i am anxious.This is my first tank. Its been up and running for 12weeks. Babies born last week. I have a heater, filter and plants. But my water looks murky. (despite water changes)

Im about to do another water change. Please please could someone help. Im worried for my fish.